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Based on their positions in the periodic table, predict which has the largest atomic radius: Li, Rb, N, F, I.
Chemistry 101
Chapter 6
Electronic Structure and Periodic Properties of Elements
Electronic Structure
Periodic Table properties
Jordin H.
June 3, 2022
The atom that has the largest first ionization energy MG, be a, B, O, TE explain
Rice University
University of Kentucky
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all right. So for this problem, we're given a list of elements in the periodic table we want to know is which one has the largest atomic radius. So first thing we should do is refresh ourselves and what the trends and atomic radius are within the periodic table. We know that atomic radius is going to increase going from right to left across the periodic table, largely because when you move within a period during within the same end energy level and that means that the number of protons are playing a huge role in the size of that nucleus. So because all the electrons are contained in the unequal to, for example, when we look a period too, Florian has nine protons condensed, its nucleus pulling, making ah very high net point charge on that nucleus compared to the three protons contained in the nucleus of lithium. So Florian's nine protons in its nucleus are going to be causing the very heavy condensation of its atomic radius. The other trend in atomic radius is as we move down a group atomic radius is also going to increase. This is mostly because the, uh, the energy levels are increasing which means that the the distance from the nucleus is increasing just as a matter of the sheer distance from the nucleus of each of these energy levels. So using these two trends, we take a look at the elements that they'd like us to consider. So we're gonna be looking at lithium, rubidium, nitrogen, Florian and Ida. So we want to find the one with largest Atomic Radius. We're going to try and find the one based on these trends that we have drawn to the left here that's furthest to the left and furthest down in its group. And when we do that, we see that rubidium is actually the element that's furthest to the left and furthest down. So it's all the way over in Group one, and it's all the way down to the unequal five energy level. So that means that rubidium is going to be the element with the largest atomic radius
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